impair red blood cell production, leading to anemia and improved oxygen levels.
8. Glossitis (swollen, inflamed tongue)
A B12 deficiency can cause the tongue to become sore, swollen, smooth, and inflamed. This is called glossitis and often leads to difficulty swallowing or speaking.
9. Vision problems
In some cases, a B12 deficiency can affect the optic nerve, causing vision problems such as blurred or double vision due to nerve damage.
10. Digestive problems
A B12 deficiency can cause digestive problems such as nausea, diarrhea, constipation, or loss of appetite.
11. Heart palpitations
People with B12 deficiency may experience palpitations or rapid heartbeat. This is associated with anemia caused by low B12 levels, which impairs the blood’s ability to carry oxygen.
Who is at risk for B12 deficiency?
Older adults: B12 absorption decreases with age.
Vegans and vegetarians: B12 is found primarily in animal products, so those who avoid meat, dairy,
